Article Search

How to Seal Concrete Before Installing Carpet

If you want to install carpet over your concrete floors, it is important that you properly seal the concrete slab. Without using a concrete sealer before installing carpet the concrete could potentially let in water that could lead to mold, mildew or water seepage.

In order to determine what concrete sealer to use it is best to perform a calcium chloride test to determine the moisture vapor emission rate (MVER) of a concrete slab.

If a high amount of moisture is present in the concrete (over 3 lb according to a calcium chloride test) it is best to use a moisture vapor barrier coating.

Carpet manufacturers recommend the moisture vapor emission rate not exceed a 3 lb or 5 lb level before installing carpet.

Benefits include the protection of carpet, wood, vinyl and other flooring by reducing the effects of moisture vapor transmission of up to 20 lb / 24 hr / 1,000 ft.

A properly sealed concrete floor will ensure the carpet remains dry and in optimal condition, at least from below.

Why Ghostshield?

  • Use the VAPOR-TEK 440 to reduce moisture vapor transmission to levels that are acceptable for the installation of carpet. The high performance and quick installation features of this system make it an ideal solution to seal concrete from all water and moisture before installing carpet. The Vapor-Tek 440 will reduce moisture vapor emission rates of up to 20lb. / 24 hr / 1,000 ft. prior to the application of flooring.

  • If your concrete has never had a moisture or dampness problem and you are looking for a cost-effective solution, use the LITHI-TEK 4500 primer followed up seven days later by the SILOXA-TEK 8510 concrete sealer. The combination of the two products will reduce the porosity of the concrete making it less permeable to moisture.

Siloxa-Tek 8510

Penetrating water & oil repel

Vapor-Tek 440

Moisture barrier epoxy coating

Lithi-Tek 4500

Concrete densifier & hardener

Published Sunday 24th of November 2013 // Updated Wednesday 15th of August 2018

Topics: how to

Pro Line Product Finder

Find your product

Not sure which of our products best fits the needs of your project? Answer questions about your specific application for a product recommendation.

Pro Line AvailableĀ At